fpga: zynqpl: Add dcache flush support

Buffers must be cache and dma aligned.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/drivers/fpga/zynqpl.c b/drivers/fpga/zynqpl.c
index 7f5d90f2a56648e6f53bfc20ae49a2912c6309ef..f5dfdcc91413bcbf018b785c460df107c2f61475 100644 (file)
--- a/drivers/fpga/zynqpl.c
+++ b/drivers/fpga/zynqpl.c
@@ -193,8 +193,8 @@ int zynq_load(Xilinx_desc *desc, const void *buf, size_t bsize)
                return FPGA_FAIL;
        }
 
-       if ((u32)buf_start & 0x3) {
-               u32 *new_buf = (u32 *)((u32)buf & ~0x3);
+       if ((u32)buf != ALIGN((u32)buf, ARCH_DMA_MINALIGN)) {
+               u32 *new_buf = (u32 *)ALIGN((u32)buf, ARCH_DMA_MINALIGN);
 
                printf("%s: Align buffer at %x to %x(swap %d)\n", __func__,
                       (u32)buf_start, (u32)new_buf, swap);
@@ -300,6 +300,10 @@ int zynq_load(Xilinx_desc *desc, const void *buf, size_t bsize)
        debug("%s: Source = 0x%08X\n", __func__, (u32)buf);
        debug("%s: Size = %zu\n", __func__, bsize);
 
+       /* flush(clean & invalidate) d-cache range buf */
+       flush_dcache_range((u32)buf, (u32)buf +
+                          roundup(bsize, ARCH_DMA_MINALIGN));
+
        /* Set up the transfer */
        writel((u32)buf | 1, &devcfg_base->dma_src_addr);
        writel(0xFFFFFFFF, &devcfg_base->dma_dst_addr);